The 20 "" 58 cc chainsaw bar with GN5800 petrol chainsaw machine is a high performance cutting tool designed for various applications. It has a two -act fuel engine with 58 cm3, offering a robust power for an effective cut. The length of the 20 -inch bar, associated with an appropriate chain, allows a smooth and effective cut through thick branches, logs and other wooden materials.
The automatic automatic packaging machine for packaging and sealing of plastic movies is a very effective packaging equipment designed to meet the various packaging needs of various industries. He uses a plastic film to closely pack the products, then applies heat to shrink the film, thus guaranteeing a safe and aesthetic packaging.
The 24V Cordless Electric Mini Portable Tea Harvesting Machine, model 4C - 35, is a highly efficient and convenient tool designed for tea picking. With dimensions of 520180190 mm, it offers a compact and portable design, making it easy to carry and operate in tea gardens. Powered by a voltage range of 16V - 31V and equipped with two 18V5Ah batteries, this machine ensures stable and continuous performance. It features a high revolution speed of 10500r/min and a revolution ratio of 4.3:1, enabling efficient cutting. The 350 mm blade length is ideal for effective tea leaf harvesting. Weighing only 1.1 kg, with a gross weight of ≤5.5kg, it is lightweight, reducing operator fatigue and enhancing productivity during tea picking tasks.
Lithium battery trimmer 3CX-30D Lithium Battery Trimmer is designed for precision tea garden management. It features a precision gearbox co-developed with Japanese and German technologies and diamond-coated blades, enabling ±15° multi-angle cutting adjustment. The lightweight body with ergonomic non-slip handles suits long-term operation.
As a medium-sized material packaging machine, it can be used for packaging granular and powder products such as tea, nuts, coffee, candy, industrial screws, etc. It has automatic packaging, automatic bag cutting, combined with filter paper and plastic film, and uses a back sealing bag making process. It can produce up to 20 bags per minute.
The Nylon Triangle Pyramids Tea Bag Packaging Machine with Outer Bag is a standout in the tea packaging field. Suited for various teas like black, green, oolong, herbal and flower tea. It makes unique triangle pyramid nylon tea bags with a square rubber outer bag for protection and appeal. Packaging speed is 2000 - 4500 bags/min. Innovation lies in precise control and stability. Advanced tech integrates inner and outer bags seamlessly. High-quality materials and sophisticated structure ensure durability. A great choice for tea makers seeking quality and innovation.
The automatic heat shrink packaging machine for plastic film packaging and sealing is a highly efficient packaging equipment designed to meet the diverse packaging needs of various industries. It uses plastic film to tightly wrap products and then applies heat to shrink the film, ensuring a secure and aesthetically pleasing packaging.
The vacuum inner film packaging machine is for packaging products like tea. Removes air by vacuuming to prevent oxidation and moisture, prolonging shelf life. Has a high-precision weighing system. Inner film protects products. Easy to operate and efficient, ideal for fresh-keeping packaging.
In tea leaves, the same green leaf is processed into green tea, black tea, oolong tea, etc. by controlling biological oxidation, a process also incorrectly called fermentation.
This process is more like a series of enzymatic reactions, perhaps better known as biological oxidation. The biooxidation of tea is a series of oxidation processes of catechins that are promoted by oxidase in the cell wall after the cell wall is damaged.
In the cells of tea, catechins are present in the cell fluid, and oxidase is mainly present in the cell wall, not mainly in microorganisms, so the cell wall needs to be damaged. This also naturally explains why fermented tea needs to be kneaded. According to the degree of oxidation of polyphenols, it is also divided into full fermentation, semi-fermentation and light fermentation.
In black tea, the degree of oxidation of polyphenols is very high, which is called full fermentation; the degree of oxidation of polyphenols in oolong tea is about half, which is called semi-fermentation.
For example, in black tea processing, the purpose of fermentation is to oxidize the catechins contained in the leaves. The leaf color changes from green to copper red, resulting in the unique color of black tea. After the tea liquid cell membrane is damaged, the polyphenols, amino acids and other substances in the vacuole are gradually oxidized. At the same time, due to the oxidation of catechins, some substances in the leaves undergo chemical action, resulting in the unique color, aroma and quality of black tea.
The above is the basic meaning of fermentation in Chinese tea.
Due to the variety of tea in China, the processing techniques and production methods are rich and colorful, and the definition of quality formation is different. In the production and quality formation process of some teas, in addition to the above-mentioned fermentation in the sense of biooxidation in addition to its own enzymatic reaction, In some links, microorganisms will also participate.
For example, in addition to the enzymatic effect, microorganisms are also involved in the stacking fermentation process of cooked Pu-erh tea.
After separation and research, the main microorganisms are Aspergillus niger, Aspergillus oryzae, Aspergillus claudin, Aspergillus griseus, Rhizopus, lactic acid bacteria and yeast. Nonetheless, it is still necessary for us to clearly distinguish fermentation involving microorganisms from fermentation in the sense of biooxidation. Otherwise, the conceptual ambiguity will easily lead to misinterpretation of the mechanism of tea quality formation.